Malicious PDF — malware analysis report

Static analysis result for SHA-256 f328bf5566c90ef6…

MALICIOUS

PDF

42.8 KB Created: 2020-08-30 21:12:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 43a8f848b6027b6130e133c3847192e2 SHA-1: 0ec7110cc4fa0a838522bc9c64d23c09b558b13d SHA-256: f328bf5566c90ef6ab1d067da25059bc523a09ae32cf860c318e391de2c095c3
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.cc'. This URL is associated with a keyword search for 'xeroquel 50 avis', suggesting a lure to a potentially harmful site. Additionally, the PDF hosts a link farm of 15 other PDFs, primarily hosted on Shopify, which is flagged as a PDF SEO link farm. The document body is heavily obfuscated but contains the malicious redirector URL. No scripts were extracted from this sample.

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/wix?keyword=xeroquel+50+avis
    • https://cdn.shopify.com/s/files/1/0434/3712/9895/files/45686112291.pdf
    • https://cdn.shopify.com/s/files/1/0438/0013/3793/files/merunomaxobiritefo.pdf
    • https://cdn.shopify.com/s/files/1/0440/8072/6168/files/encyclopdie_mdicale_gratuit.pdf
    • https://cdn.shopify.com/s/files/1/0440/2626/5765/files/93064595588.pdf
    • https://cdn.shopify.com/s/files/1/0429/1811/7543/files/wukamawoxafuxok.pdf
    • https://cdn.shopify.com/s/files/1/0434/6845/6088/files/98091154593.pdf
    • https://cdn.shopify.com/s/files/1/0435/8150/5695/files/agentes_economicos_libros.pdf
    • https://cdn.shopify.com/s/files/1/0430/4365/1741/files/i_am_not_spock.pdf
    • https://static.usrfiles.com/ugd/b8c837_092b74518d404cc1a27c168feabe2e65.pdf
    • https://static.usrfiles.com/ugd/36f25b_bde6fc0492af45968a9506dc12683a4a.pdf
    • https://static.usrfiles.com/ugd/b8c837_1b8d0798de2a4789a4b0b27ac73622b5.pdf
    • https://static.usrfiles.com/ugd/b8c837_5fdb7d79bdff4ada8e030df7de01ffe3.pdf
    • https://static.usrfiles.com/ugd/eed56f_bb15a3d6d1ea4577a40e0950ea25dd08.pdf
    • https://static.usrfiles.com/ugd/b8c837_33addcbd8a7c4947b9607219c9691ddd.pdf
    • https://static.usrfiles.com/ugd/b8c837_a3fad402974c48eda4ff995286b5a2a6.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005db0.bin
411aae7039b1f884cb049c12895a555ee9d264c147174fc7f3dc915954760225
pdf-font-stream PDF embedded font (sfnt) at offset 0x5DB0 4804 bytes
font_01_sfnt_off00006e1a.bin
a2686700e1c1fb277c26e3e9636446ed0833bc99c05c3bc49c7ca7fd302625f4
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E1A 10184 bytes
font_02_sfnt_off00009079.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x9079 4324 bytes